Linear and quadratic behaviors in a two-level laser

IF 3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Annals of Physics Pub Date : 2024-11-01 DOI:10.1016/j.aop.2024.169832
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Abstract

A two-level atom is enclosed in a single-mode optical cavity, and the occurring processes in this system have been theoretically examined in the steady-state. In the non-resonance case and in several different instances, the lasing and non-lasing regimes are specified in the semiclassical approximation in the parameter space. The behavior of the system is fully described for the time when there are a small or large number of photons in the cavity. The semiclassical approximation is shown in two different frameworks, and its results are well confirmed by the quantum simulations when there are many photons in the cavity. To observe the change in the behavior of the emitted light near the laser threshold, the second order coherence function and the Fano factor have been used. In explaining the antibunching process, the explicit form of the second order coherence function has been obtained in two different representations. This function is equal in both representations to the lowest order and its findings are in good agreement with the quantum model.
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双电平激光器中的线性和二次方行为
在单模光腔中封装了一个两级原子,并对该系统在稳态下的发生过程进行了理论研究。在非共振情况和几种不同的情况下,在参数空间的半经典近似中明确了激光和非激光状态。当空腔中存在少量或大量光子时,系统的行为得到了充分描述。半经典近似方法在两个不同的框架中进行了展示,当腔中存在大量光子时,其结果得到了量子模拟的很好证实。为了观察激光阈值附近发射光行为的变化,使用了二阶相干函数和法诺因子。在解释反束过程时,二阶相干函数的明确形式是通过两种不同的表示方法获得的。该函数在两种表示法中都等于最低阶,其结果与量子模型十分吻合。
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来源期刊
Annals of Physics
Annals of Physics 物理-物理:综合
CiteScore
5.30
自引率
3.30%
发文量
211
审稿时长
47 days
期刊介绍: Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.
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